PMID- 1702200 OWN - NLM STAT- MEDLINE DCOM- 19910201 LR - 20190501 IS - 0305-1048 (Print) IS - 1362-4962 (Electronic) IS - 0305-1048 (Linking) VI - 18 IP - 23 DP - 1990 Dec 11 TI - Activating-transcription-factor (ATF) regulates human 7S L RNA transcription by RNA polymerase III in vivo and in vitro. PG - 6779-84 AB - The gene-external part of the human 7S L promoter was analyzed by transcription in vitro and in vivo. Compared to the wild type promoter (-178), a -66 5'deletion mutant revealed full activity in vitro but was inefficiently transcribed in vivo. Further deletion to -37 reduced template activity to 50% in vitro and to basal level expression in vivo (below 5%). A DNase I footprint observed around position -50 protected an ATF-like binding site ('TGACGT'). With respect to 7S L transcription regulation, the functionality of this ATF-like binding site was confirmed in competition experiments and by mutation analysis. Furthermore, S100 extracts of cells pretreated with forskolin in vivo to induce the cAMP system, revealed significantly increased transcription of 7S L RNA in vitro, with no effect on a 7S K RNA gene, lacking such an ATF binding site. Thus, the 7S L RNA gene too is controlled by a regulatory element originally defined in class II promoters and represents another rare example where a specific type of transcription regulation in vivo can be mimicked with cell-free extracts in vitro. FAU - Bredow, S AU - Bredow S AD - Department of Biochemistry, Faculty of Chemistry, Ruhr-University, Bochum, FRG. FAU - Surig, D AU - Surig D FAU - Muller, J AU - Muller J FAU - Kleinert, H AU - Kleinert H FAU - Benecke, B J AU - Benecke BJ LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Nucleic Acids Res JT - Nucleic acids research JID - 0411011 RN - 0 (Activating Transcription Factors) RN - 0 (Blood Proteins) RN - 0 (Transcription Factors) RN - 1F7A44V6OU (Colforsin) RN - 63231-63-0 (RNA) RN - E0399OZS9N (Cyclic AMP) RN - EC 2.7.7.6 (RNA Polymerase III) SB - IM GS - 7S L MH - Activating Transcription Factors MH - Base Sequence MH - Binding Sites MH - Binding, Competitive MH - Blood Proteins/*metabolism MH - Colforsin/pharmacology MH - Cyclic AMP/metabolism MH - DNA Mutational Analysis MH - *Gene Expression Regulation MH - Genes MH - HeLa Cells MH - Humans MH - Molecular Sequence Data MH - Promoter Regions, Genetic MH - RNA/*genetics MH - RNA Polymerase III/*metabolism MH - Transcription Factors/*metabolism MH - *Transcription, Genetic MH - Transfection PMC - PMC332731 EDAT- 1990/12/11 00:00 MHDA- 1990/12/11 00:01 CRDT- 1990/12/11 00:00 PHST- 1990/12/11 00:00 [pubmed] PHST- 1990/12/11 00:01 [medline] PHST- 1990/12/11 00:00 [entrez] AID - 10.1093/nar/18.23.6779 [doi] PST - ppublish SO - Nucleic Acids Res. 1990 Dec 11;18(23):6779-84. doi: 10.1093/nar/18.23.6779.